Amazon Catalog Mapping Optimization -- 2

My current Amazon FBA catalog has out-of-date parent/child links and scattered SKU data, making inventory tracking harder than it should be. I want to bring everything into one clean, logically mapped structure so I can manage stock with confidence and avoid stranded or duplicated listings.

Here’s the outcome I’m after:
• A master catalog map that groups every SKU under the correct parent, variant, and browse node hierarchy
• An easy-to-maintain flat-file template (Excel or CSV) ready for bulk upload in Seller Central
• Clear, step-by-step notes explaining the mapping logic so future audits or new ASIN additions stay consistent

Success for me means the inventory dashboard in Seller Central instantly reflects accurate counts and variations without manual workarounds. If you know your way around flat-file templates, bulk uploads, and the quirks of Amazon’s parentage rules, I’d love to hear how you would tackle this and how long you’d need to deliver the finished files and documentation.